CN112460897A - Refrigerator and control method of instant freezing chamber thereof - Google Patents
Refrigerator and control method of instant freezing chamber thereof Download PDFInfo
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- CN112460897A CN112460897A CN202011402823.9A CN202011402823A CN112460897A CN 112460897 A CN112460897 A CN 112460897A CN 202011402823 A CN202011402823 A CN 202011402823A CN 112460897 A CN112460897 A CN 112460897A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/06—Sensors detecting the presence of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/16—Sensors measuring the temperature of products
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- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a refrigerator and a instant freezing and refrigerating control method thereof. The control method comprises the steps of controlling the instant freezing program to be started when the refrigerator controller detects that the temperature of food put into the instant freezing chamber is higher than a set temperature T, and controlling the temperature in the instant freezing chamber in stages by the instant freezing program to enable the food to reach a freezing state through a precooling cooling stage, a stepped cooling stage and a supercooling removing stage and then rise back to a micro-freezing stage for freezing and storing. The invention well solves the intelligent operation problem of the instant freezing chamber of the refrigerator and keeps the nutrition of the frozen meat to the maximum extent.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigerator and a control method of an instant freezing chamber of the refrigerator.
Background
In order to keep food fresh, it is common practice to store the food in a freezer compartment of a refrigerator at a relatively low temperature so that the temperature of the food gradually reaches the cryopreservation temperature. The freezing method is long in time, the food is frozen from the outside and then gradually frozen inwards, the freezing temperature of the food is uneven, the food can stay in the area of the maximum ice crystal generation zone for a long time, and the condition is easy to destroy the nutrition of the food. In order to maintain the nutrition of frozen foods, a method of rapidly freezing foods and then preserving the foods has also been proposed. Chinese patent CN105043009A proposes a method for freezing and preserving food in a refrigerator, which comprises freezing food in a supercooled state at a temperature lower than the freezing temperature, and then raising the temperature to the freezing temperature for preservation. The method improves the preservation of food, but still has the following defects:
1. after a user opens the door and puts in food, the instant freezing program needs to be manually started, intelligent operation cannot be realized, and consumers are easy to forget to start the instant freezing function, so that the instant freezing preservation of the food cannot be well carried out;
2. the temperature reduction process from the ambient temperature to the supercooled state is fast, and the condition of uneven inside and outside temperature still exists in the food freezing process, so that the food quality is reduced.
Disclosure of Invention
The invention provides a refrigerator and a control method of an instant freezing chamber thereof, which aim to solve the problems that the instant freezing process can not be intelligentized, and the food quality is reduced due to the uneven temperature inside and outside the food in the freezing process in the prior art.
The invention provides a refrigerator instant freezing chamber control method, which comprises the following steps: when the refrigerator controller detects that the surface temperature of the food put into the instant freezing chamber is greater than or equal to the set temperature T, the instant freezing program is controlled to be started, and the instant freezing program controls the temperature in the instant freezing chamber in stages, so that the food is raised to be refrigerated in the micro-freezing stage after passing through the pre-cooling temperature-reducing stage, the step temperature-reducing stage and the supercooling temperature-reducing stage.
And in the precooling and cooling stage and the stepped cooling stage, the opening temperature of the air door of the instant freezing chamber is controlled to be the sum of the set temperature of the corresponding interval and half of the floating temperature TB1, and the closing temperature of the air door of the instant freezing chamber is controlled to be the difference between the set temperature of the corresponding interval and half of the difference value TB2 of the opening temperature of the instant freezing chamber.
Preferably, the set temperature T is 5 ℃.
Preferably, the temperature range T1 of the pre-cooling and temperature-reducing stage is 5 ℃ and more than T1 and more than 0 ℃, and the duration T1 is 1h and more than T1 and more than 0 h.
Preferably, the step cooling stage comprises at least three step cooling intervals, so that the interior and exterior of the food are in a uniform state and are gradually cooled.
In one embodiment, the step cooling stage includes nine cooling intervals from T2 to T10.
Preferably, the temperature T11 of the supercooling release stage is in the range of-18 ℃ to-50 ℃, and the duration T11 is in the range of 24h ≧ T11 > 0 h.
Preferably, the freezing temperature of the partial freezing stage is in the range of-5 ℃ to-5.5 ℃.
The invention also provides a refrigerator which comprises the instant freezing chamber, and the instant freezing chamber adopts the instant freezing chamber control method.
Compared with the prior art, the invention has the following beneficial effects:
1. the refrigerator provided by the invention can intelligently sense whether food is put in the instant freezing chamber or not, automatically start the instant freezing program, reduce key operation of a user and avoid manual intervention;
2. according to the invention, the infrared temperature sensor is used for sensing the surface temperature of food in real time, and the temperature reduction and freezing program of the instant freezing chamber is accurately controlled;
3. the invention provides a brand-new instant freezing and cooling control method, which can uniformly cool the internal and external temperatures of food in the freezing process, realize the fresh-keeping storage of meat, reduce the juice loss of the food compared with the traditional freezing technology and keep the nutrition of the frozen meat to the maximum extent.
Drawings
The invention is described in detail below with reference to the following figures and specific examples, wherein:
FIG. 1 is a schematic view of a refrigerator;
FIG. 2 is a flow chart of a control method of the present invention;
fig. 3 is a cooling flow chart according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are only for illustrating the present invention and are not to be construed as limiting the present invention.
A general refrigerator generally includes a refrigerating chamber and a freezing chamber. The food to be preserved, especially high protein food such as meat and fish, is frozen and preserved in a freezing chamber. During freezing, the food product begins to cool from the surface, eventually bringing the center portion of the food to a full freeze. Due to such uneven temperature during freezing, large needle-shaped ice crystals are easily formed from the surface of the food to the central portion, and the large needle-shaped ice crystals may destroy the texture of the food itself, resulting in reduction or loss of the nutritional components of the food. To solve this problem, a refrigerator with an instant freezing chamber, as shown in fig. 1, including a refrigerating chamber 1, an instant freezing chamber 2, and a freezing chamber 3 has been introduced in the market. The quality of the food is also influenced by how to control the temperature of the instant freezing chamber, and the core problem is how to control the temperature of the food cooling process to be uniformly reduced.
The invention designs a refrigerator with an instant freezing chamber, wherein a temperature sensor 4 connected with a refrigerator controller is arranged at the top of the instant freezing chamber, and in the embodiment, the temperature sensor adopts an infrared temperature sensor. When a user opens the instant freezing chamber to put food, the infrared temperature sensor positioned at the top of the instant freezing chamber senses the surface temperature of the food and transmits a sensed temperature signal to the controller, the controller receives the signal and judges, when the surface temperature of the food is more than or equal to a set temperature T, the controller controls the compressor to be started, simultaneously the air door of the instant freezing chamber is started, and the instant freezing program is started to cool the food, as shown in figure 2.
The instant freezing and refrigerating control method of the instant freezing chamber provided by the invention controls the temperature in the instant freezing chamber in stages, so that food is frozen through three stages and then is frozen and stored in a micro-freezing stage. The three stages comprise a precooling and cooling stage, a stepped cooling stage and a supercooling relieving stage.
The temperature T1 of the pre-cooling and temperature-reducing stage is generally in the range of 0-5 ℃ and the duration T1 is about 1 h.
The stepped cooling stage may include several stepped cooling sections, including at least three cooling sections, and the cooling gradient may be set in the interval of 0-5.5 deg.c for the inner and outer food to be cooled gradually.
The temperature T11 of the supercooling release stage ranges from-18 ℃ to-50 ℃, and the duration T11 is about 24 h. The inner temperature and the outer temperature of the food are consistent after passing through the supercooling cooling stage, the needle-shaped ice crystal band caused by nonuniform temperature in the supercooling stage is smoothly avoided, and the food is in the supercooling removing stage at the moment and rapidly reaches the freezing temperature. After the food is frozen, the temperature of the instant freezing chamber is quickly raised to a supercooled state, so that the food is frozen and stored in a micro-freezing stage. The freezing storage temperature is from-5 ℃ to-5.5 ℃.
Fig. 3 is a cooling flow chart according to an embodiment of the present invention, which includes the following steps:
s1, entering a precooling and cooling stage when the surface temperature T of the instant freezing chamber is more than or equal to 5 ℃;
s2, the instant freezing chamber enters a step cooling stage;
s3, the instant freezing chamber enters a supercooling relieving stage;
and S4, raising the instant freezing chamber back to a micro-freezing stage for freezing and storing.
The specific operation steps are as follows: when the refrigerator receives a temperature signal sensed by the infrared temperature sensor and judges that the temperature is more than or equal to 5 ℃, the air door of the instant freezing chamber is opened, and the instant freezing chamber is controlled to enter the instant freezing cooling operation, which comprises the following steps:
step 10, precooling and cooling: and (5) cooling the instant freezing chamber to operate according to the preset temperature T1, and running for a time T1. When the temperature of the instant freezing chamber reaches a first starting temperature point TON1, a compressor starting air door is opened, and precooling and cooling operation is carried out on the instant freezing chamber; when the flash chamber temperature reaches the first shutdown temperature point TOFF1, the flash chamber damper is closed. TON1= T1+ TB1/2, TOFF1= TON 1-TB 2/2. TB1 and TB2 are known parameters, TB1 indicates the floating temperature of the starting point of the instant freezing chamber in the starting process of the compressor, and TB2 indicates the difference value of the starting temperature and the stopping temperature of the instant freezing chamber. The temperature T1 has a value range of: t1 is more than 0 ℃ at the temperature of 5 ℃, and the value range of the time T1 is as follows: t1 is more than 0h and is more than or equal to 1 h.
Step 20, a step cooling stage, in which nine gradient zones are adopted to cool food:
(21) and (5) cooling the instant freezing chamber to operate according to the preset temperature T2, and running for a time T2. When the temperature of the instant freezing chamber reaches a second starting temperature point TON2, opening an air door of the instant freezing chamber; when the flash chamber temperature reaches the second shutdown temperature point TOFF2, the flash chamber damper is closed. Wherein TON2= T2+ TB1/2, TOFF2= TON 2-TB 2/2. TB1 and TB2 are known parameters, and the value range of the temperature T2 is as follows: the temperature of-1 ℃ is not less than T2 and not less than-1.5 ℃, and the value range of the time T2 is as follows: t2 is more than 0h and is more than or equal to 1 h.
(22) And (5) cooling the instant freezing chamber to operate according to the preset temperature T3, and running for a time T3. When the temperature of the instant freezing chamber reaches a third opening temperature point TON3, opening an air door of the instant freezing chamber; when the flash chamber temperature reaches the third shutdown temperature point TOFF3, the flash chamber damper is closed. Wherein TON3= T3+ TB1/2, TOFF3= TON 3-TB 2/2; TB1 and TB2 are known parameters, and the value range of the temperature T3 is as follows: the temperature of-1.5 ℃ is more than T3 and is more than or equal to-2 ℃, and the value range of the time T3 is as follows: t3 is more than 0h and is more than or equal to 0.5 h.
(23) And (5) cooling the instant freezing chamber to operate according to the preset temperature T4, and running for a time T4. When the temperature of the instant freezing chamber reaches a fourth engine temperature point TON4, opening an air door of the instant freezing chamber; when the flash chamber temperature reaches the fourth shutdown temperature point TOFF4, the flash chamber damper is closed. Wherein TON4= T4+ TB1/2, TOFF4= TON 4-TB 2/2, TB1 and TB2 are known parameters, and the value range of the temperature T4 is as follows: the temperature of-2 ℃ is more than T4 and more than or equal to-2.5 ℃, and the time T4 has the value range: t4 is more than 0h and is more than or equal to 0.5 h.
(24) And (5) cooling the instant freezing chamber to operate according to the preset temperature T5, and running for a time T5. When the temperature of the instant freezing chamber reaches a fifth starting temperature point TON5, opening an air door of the instant freezing chamber; when the flash chamber temperature reaches the fifth shutdown temperature point TOFF5, the flash chamber damper is closed. Wherein TON5= T5+ TB1/2, TOFF5= TON 5-TB 2/2, and the temperature T5 is in the following range: -2.5 ℃ is more than T5 and is more than or equal to-3 ℃, and the time T5 has the value range: t5 is more than 0h and is more than or equal to 0.5 h.
(25) And (5) cooling the instant freezing chamber to operate according to the preset temperature T6, and running for a time T6. When the temperature of the instant freezing chamber reaches a sixth starting temperature point TON6, opening an air door of the instant freezing chamber; when the flash chamber temperature reaches the sixth shutdown temperature point TOFF6, the flash chamber damper is closed. Wherein TON6= T6+ TB1/2, TOFF6= TON 6-TB 2/2, and the temperature T6 is in the following range: the temperature of minus 3 ℃ is more than T6 and is more than or equal to minus 3.5 ℃, and the time T6 has the value range: t6 is more than 0h and is more than or equal to 0.5 h.
(26) And (5) cooling the instant freezing chamber to operate according to the preset temperature T7, and running for a time T7. When the temperature of the instant freezing chamber reaches a seventh starting temperature point TON7, opening an air door of the instant freezing chamber; when the flash chamber temperature reaches the seventh shutdown temperature point TOFF7, the flash chamber damper is closed. Wherein TON7= T7+ TB1/2, TOFF7= TON 7-TB 2/2, and the temperature T7 is in the following range: -3.5 ℃ is more than T7 and is more than or equal to-4 ℃, and the time T7 has the value range: t7 is more than 0h and is more than or equal to 0.5 h.
(27) And (5) cooling the instant freezing chamber to operate according to the preset temperature T8, and operating for T8 time. When the temperature of the instant freezing chamber reaches an eighth starting temperature point TON8, opening an air door of the instant freezing chamber; when the flash chamber temperature reaches the eighth shutdown temperature point TOFF8, the damper of the flash chamber is closed. Wherein TON8= T8+ TB1/2, TOFF8= TON 8-TB 2/2, and the temperature T8 is in the following range: the temperature of minus 4 ℃ is more than T8 and is more than or equal to minus 4.5 ℃, and the time T8 has the value range: t8 is more than 0h and is more than or equal to 0.5 h.
(28) And (5) cooling the instant freezing chamber to operate according to the preset temperature T9, and operating for T9 time. When the temperature of the instant freezing chamber reaches a ninth starting temperature point TON9, an air door of the instant freezing chamber is opened; when the flash chamber temperature reaches the ninth shutdown temperature point TOFF9, the damper of the flash chamber is closed. Wherein TON9= T9+ TB1/2, TOFF9= TON 9-TB 2/2, and the temperature T9 is in the following range: -4.5 ℃ is more than T9 and is more than or equal to-5 ℃, and the time T9 has the value range: t9 is more than 0h and is more than or equal to 0.5 h.
(29) And (5) cooling the instant freezing chamber according to the preset temperature T10, and running for a time T10. When the temperature of the instant freezing chamber reaches a tenth starting temperature point TON10, an air door of the instant freezing chamber is opened; when the flash chamber temperature reaches the tenth shutdown temperature point TOFF10, the flash chamber damper is closed. Wherein TON10= T10+ TB1/2, TOFF10= TON 3-TB 2/2, and the temperature T10 is in the following range: the temperature of minus 5 ℃ is more than T10 and is more than or equal to minus 5.5 ℃, and the time T10 has the value range: t10 is more than 0h and is more than or equal to 0.5 h.
When the temperature in the step cooling stage reaches T10, the supercooling maintaining stage can be added as required, namely the temperature is maintained for about half an hour at T10.
Step 30, supercooling release stage: and (5) cooling the instant freezing chamber to operate according to the preset temperature T11, and running for a time T11. When the temperature of the instant freezing chamber reaches an eleventh starting temperature point TON11, an air door of the instant freezing chamber is opened; when the flash chamber temperature reaches the eleventh shutdown temperature point TOFF11, the flash chamber damper is closed. Wherein TON11= T11+ TB1/2, TOFF11= TON 11-TB 2/2. The temperature T11 has a value range of: -50 ℃ is more than T11 and more than or equal to-18 ℃, and the time T11 has the value range: t11 is more than 0h for 24h and more than or equal to t 11.
Step 40, a slight freezing stage: the temperature of the instant freezing chamber is reduced to operate according to the preset temperature T9, and when the temperature of the instant freezing chamber reaches a ninth starting temperature TON9, an air door of the instant freezing chamber is opened; when the flash chamber temperature reaches the ninth shutdown temperature point TOFF9, the damper of the flash chamber is closed. Wherein TON9= T9+ TB1/2, TOFF9= TON 9-TB 2/2, and the temperature T9 is in the following range: -4.5 ℃ and T9 are higher than-5 ℃.
The temperature and time corresponding relation of the instant freezing chamber is as follows:
| 5℃≥T1＞0℃， | 1h≥t1＞0h |
| -1℃≥T2≥-1.5℃ | 1h≥t2＞0h |
| -1.5℃＞T3≥-2℃ | 0.5h≥t3＞0h |
| -2℃＞T4≥-2.5℃ | 0.5h≥t4＞0h |
| -2.5℃＞T5≥-3℃ | 0.5h≥t5＞0h |
| -3℃＞T6≥-3.5℃ | 0.5h≥t6＞0h |
| -3.5℃＞T7≥-4℃ | 0.5h≥t7＞0h |
| -4℃＞T8≥-4.5℃ | 0.5h≥t8＞0h |
| -4.5℃＞T9≥-5℃ | 0.5h≥t9＞0h |
| -5℃＞T10≥-5.5℃ | 0.5h≥t10＞0h |
| -50℃＞T11≥-18℃ | 24h≥t11＞0h |
the invention well solves the intelligent operation problem of the instant freezing chamber of the refrigerator, reduces the key operation of a user and has good user experience. In addition, the invention well solves the problem of uniform temperature drop in food freezing, reduces juice loss of instant frozen food in the freezing process and maintains the nutrition of frozen meat to the maximum extent.
The foregoing is considered as illustrative only of the embodiments of the invention. It should be understood that any modifications, equivalents and changes made within the spirit and framework of the inventive concept are intended to be included within the scope of the present invention.
Claims (10)
1. A control method of an instant freezing chamber of a refrigerator is characterized by comprising the following steps: when the refrigerator controller detects that the surface temperature of the food put into the instant freezing chamber is greater than or equal to the set temperature T, the instant freezing program is controlled to be started, the instant freezing program controls the temperature in the instant freezing chamber in stages, so that the food reaches a freezing state through a precooling cooling stage, a stepped cooling stage and a supercooling removing stage, and then the food is frozen and stored in a micro-freezing stage.
2. The control method as claimed in claim 1, wherein in the pre-cooling stage and the stepped cooling stage, the opening temperature of the instant freezing chamber damper is controlled to be the sum of half of the set temperature and the floating temperature TB1 of the corresponding section, and the closing temperature of the instant freezing chamber damper is controlled to be the difference between the set temperature of the corresponding section and half of the difference TB2 between the set temperature of the instant freezing chamber and the start temperature of the instant freezing chamber.
3. The control method according to claim 1, wherein the set temperature T is 5 ℃.
4. The control method of claim 1, wherein the temperature T1 of the pre-cooling and temperature-reducing stage is in the range of 5 ℃ and above T1 > 0 ℃ and the duration T1 is in the range of 1h and above T1 > 0 h.
5. The control method according to claim 1, wherein the step-cooling stage comprises at least three step-cooling sections, so that the food is cooled gradually in a uniform state inside and outside the food.
6. The control method of claim 5, wherein the step cooling stage comprises nine cooling intervals T2-T10.
7. The control method according to claim 6, wherein the temperature range and the time range of the temperature reduction interval of the step temperature reduction stage are as follows:
。
8. the control method according to claim 1, wherein the temperature T11 of the supercooling release stage is in the range of-18 ℃ to-50 ℃ and the duration T11 is in the range of 24h ≧ T11 > 0 h.
9. The method of claim 1, wherein the freezing temperature in the partial freezing stage is from-5 ℃ to-5.5 ℃.
10. A refrigerator comprising an instant freezing chamber, characterized in that the instant freezing chamber of the refrigerator employs the control method of any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114264102A (en) * | 2021-12-30 | 2022-04-01 | 珠海格力电器股份有限公司 | Refrigerator control method and refrigerator |
| CN114923311A (en) * | 2022-05-13 | 2022-08-19 | 珠海格力电器股份有限公司 | Control device of refrigerator, refrigerator and control method |
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